Updated for .xinitrc.d and $USERWM, simplified

DWM-ON-OS-X.md

Installing and configuring dwm on OS X (tested on Mountain Lion, Mavericks)

1. Install XQuartz.

2. Install dwm using Homebrew (or whatever):

   brew install dwm
   

3. Create a xinitrc.d script for dwm:

   mkdir ~/.xinitrc.d
   echo "USERWM=/usr/local/bin/dwm" > ~/.xinitrc.d/00-dwm.sh
   chmod +x ~/.xinitrc.d/*
   

4. Run XQuartz, dwm should start.

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It might be useful to tweak some XQuartz settings (just press ⌘,) like full screen, clipboard, etc.

You can also hide the os x top bar by editing xquartz's plist.
sudo nano /Applications/Utilities/XQuartz.app/Contents/Info.plist
and add among the other keys

<key>LSUIPresentationMode</key>
<string>AllSuppressed</string>

However, the space underneath the hidden bar is unusable. Using Meta-b retracts this space further. One step closer to fullscreen!

I had to run the following to get the meta key working:

touch ~/.xmodmaprc
xmodmap -e 'remove Mod2 = Meta_L' -e 'add Mod1 = Meta_L' ~/.xmodmaprc

Thanks for the simplified instructions :)